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英语四六级语法归纳

 在复习六级考试的过程中,大家是不是对语法部分很头疼呢?以下是定语从句的知识点归纳,超级详细!

1.先行词为all, anything, something, nothing, everything, much, little, none等不定代词时,关系代词一般只用that,不用which。在大多数情况下that可以省略.

 Please tell me everything (that) you know about the matter.

2.as引出的限制性定语从句

 在such …as的结构中as可作关系代词,引出限制性定语从句。有时和same连用,在从句中可作主语、宾语或表语等。

 Such people as were recommended by him were reliable.

3.as引出的非限制性定语从句

 as可作关系代词引出非限制性定语从句,代替整个主句,通常译为“(正)如…一样”,“(正)象…一样”等。as引导的从句一般用逗号与主句隔开,可以位于主句的前面、中间或后面.

 I live a long way from work, as you know.

4.分隔式定语从句

 定语从句一般紧跟在先行词之后,但有时会被其他句子成分与先行词隔开,从而构成分隔式定语从句。

 The days are gone when power politics worked.

5.介词+关系代词(which/whom等)引出的定语从句

 如果关系代词(which/whom等)在定语从句中作介词的宾语,那么这个介词可以提到从句前,构成“介词+关系代词(which/whom等)+定语从句”。在这种结构中关系代词不可以用that。

 This is a subject about which we might argue for a long while.

6.关系代词在限制性定语从句中常可以省略,一般有以下几种情况

 1) 关系代词在从句中作直接宾语时,在大多数情况下可以省略。

  This is something (that) you must always keep in mind.

  关系代词作介词宾语时,介词位于句尾时关系代词可以省略;介词位于关系代词之前时则关系代词不能省略。

  This is the room (which) Churchill was born in.

 2) 关系代词作主语时一般不能省略,但如果关系代词在由there …be存在句构成的定语从句中作主语时常可省略。

  This is the only book (that) there is on this subject.

 3) 在way后面的定语从句中in which或that通常省略。

  That’s the way (that/in which) I look at it.

7.非限制性定语从句

 非限制性定语从句修饰先行词或整个主句,起补充说明的作用,如果省略掉,原句句意仍保持完整。非限制性定语从句要用逗号与主句隔开,其引导词不能用that。非限制性定语从句属于正式语体。经常考到的非限制性定语从句有以下三种。

 1)由which、as引导的非限制性定语从句。which、as代表整个主句。

  He said that he had never seen her before, which was not true.

 2)由 “介词+关系代词”引导的非限制性定语从句。

  He sent her a letter, in which he said that he was sorry for what he had done to her.

 3)由 “数词、代词或名词+of +关系代词”引导的非限制性定语从句。

  He had three sons, one of whom was my son’s classmate.


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